Computer Science – Programming with JAVA

Which of the following is not a primitive data type?

What is the output of the following program?
public class TestFirstApp {
public static void main (string [] args) {
System.out.println ( (1==1) ? (7 == 8) ? 5: 6 : 4) ;
}
}

Consider the following program.
Public class TestFirst App {
public static void main (string [] args) {
int wer;
System.out.println (“The value of wer is : ” + wer) ;
}
}
Choose the correct statement(s).

The statements
byte var = -9;
System. out. println (var);

The finally block is executed

What is the output of this program?

What is the output if the last statement in this program is replaced by the following statement?
System.out.println (myobj.doit(myobj.doid(myobj.doit(myArr[2], 0) ,

myobj.doit(myArr[1], 0) ,

) , 0

)

);

The operators ||, &&, *, !, if arranged in the ascending order of precedence, read

The statement
System.out.print ((double) 7/4);
prints

Which of the following control structures is the most appropriate to implement the logic outlined in this flowchart?

Which of the following statements correctly implement the logic outlined in this flowchart?

Which of the following statement correctly implement the logic outlined in this flowchart?

What is the environment variable that contains a list of directories where Java looks for classes referenced in a program?

Consider the statement
system.out.print (Math.round (Math.random ()) ) ;
This statement can print

is null an object ?

Which of the following methods is used to get the error message for the exception that was thrown?

What condition could go into the black box if the following for loop prints 123456?
int[] myArr = { 1, 2, 3, 4, 5, 6};
int m = myArr.length;
for (; _____ ; –m)
system.out.print(myArr[myArr.length-m]);

What is the output of the following program?
public class TestFirstApp {
public static void magic (int x) {
system.out.print (x%10) ;
if ( (x/10) ! = 0)
magic (x/10) ;
system.out.print(x%10);
}
public static void main (string [] args) {
Test FirstApp. magic (2357) ;
}
}

subclass is also called

Which of the following ways of declaring and initializing a 1-dimensional integer array a size three is/are syntactically correct?

What is the output of the following program?
public class TestFirst App {
public static void main (string [ ] args ) {
int a=1, b=13 ;
if ( (b<(a=a+a)) || (b<(a=a+a)) || (b<(a=a+a)) || (b<(a=a+a)) || (b<(a=a+a))) system.out.println (b-a); else system.out.println (b+a); } }

The following program
public class TestFirstApp {
public static void main (string [] args) {
int m=3 ;
system.out.println (m++ + ++m);
}
}

Which of the following statements will result in compilation error?

The statements
double whatIsthis = -1.0/0.0;
system.out.println(whatisThis) ;

Math.ceil(x) has the same value as

Let m be a variable of datatype byte. The value of m<<4 is same as

The statements
string wer1 = new string(“Hi”);
string wer2 = new string(“Hi”);
if (wer1 == wer2)
system.out.println(“This is not the answer”);
else
system.out.println?(“This is the answer”);

What does the following program output?
public class TestFirstApp {
public static void main (string [] args) {
int count = 0
for (int var = 0;
for (int var = 0; var < 1000; var = var + 1) { if (var % 3 == 1) { count++; var = var+3; } } system.out.print(count); } }

Which of the following operators take(s) only integer operands?

How many #’s do the following statements print?
for (int m=0, n=10; n-m > 5 ; ++m, –n)
system.out.print (“#”) ;

Exceptions that are expected to possibly occur are called

Which of the following options correctly implement this grading logic?
(Assume marks is an integer between 0 to 100, both inclusive,)

Which of the following options correctly implement this grading logic?
(Assume marks is an integer between 0 to 100, both inclusive.)

The following statements
String wer = “12\u3456\u78910”;
System.out.println(wer.length.length() );

Which of the following calls find the maximum of three gives integers a,b and c?

Garbage collector frees the programmer from worrying about.

What is the output of this program?

Replace Statement A, by the statement, new second () ;
Choose the correct statement(s).

Replace Statement A, by the statement ,new third () ;
Choose the correct statement(s).

Which of the class definitions has/have initialization block?

The keywords – try, catch, and finally, are typically used in the sequence

What does the following program output?
public class TestFirstApp {
public int i ;
public TestFirst App () {
System.out.pirnt (“**” + i + “**”) ;
i = 6;

} system.out.print (“**” + i + “**”) ; i=10; ]
public static void main (string [] args {
TestFirst App myobj = new TestFirstApp () ;
System.out.print(“**” + myobj. i + “**”) ;
}

What expression should go into the black box for the method call to be syntactically correct?
public class TestFirstApp {
public int doit (int [] i) {
return i[1] ;
}
public sta’ic void main (string[] args) {
TestFirstApp myObj = new TestFirst App ( );
System.out.print (myObj.doit (_____ ; ) ;
}
}

Automatic conversion from primitive type to an object of the corresponding wrapper class is called

Consider the condition.
(m>5) || n!=m)
How will you rewrite this condition if java doesn’t have the || operator?

The fact that any program can print using System.out.print, implies that

Which of the following are valid identifiers?

The program fragment
int x= 1, m=o;
for ( ; m<10 ; ++m)
x = x+x;
System.out.print (x) ;
prints

Elements of an array have the same

What does the following program output?
public class TestFirstApp {
void doIt ( ) {
System.out.print main (string [] args) {
TestFirstApp wer = new TestFirstApp () ;
wer.doIt ();
}
}

Which of the following declaration is/are correct?

The following program
public class TestFirstApp {
public static void main (string [] args) {
int [] [] wer = new int [] [] {{1, 5}, {6, 8}};
System.out.println(wer[1] [1] ;
}
}

Which of the following doesn’t have a superclass?

What is the output of the following program?
public class TestFirstApp {
public static void main (string [] args) {
int a=1, b=2, c=3 ;
a = b = c = 3 ;
System.out.println(1) ;
}
}

Which of the following are widely accepted naming conventions in Java?

What is the output of the following program?
public class TestFirstApp {
public static void main (string [] args) {
boolean a=false;
if (! a&&a)
System.out.println(4);
else
System.out.println(5);
}
}

The following program
public class TestFirstApp {
public static void main (string [] args {
byte a = (byte) 128;
System.out.println(a);
}

A class variable is a variable that is declared inside a class as

The statements
double whatIsThis = -1.0/Double.POSITIVE_INFINITY;
System.out.println(whatIsThis) ;

Which of the following three statements results in compilation error?
int m1 = (short) 2.3; // Statement 1
short m2 = (int) 2.3; // Statement 2
byte m3 = (int) 2.3; // Statement 3

Constants that cannot be changed are declared using the keyword

The statement
System.out.println(Math.ceil(12.3) – Meth.floor(3.9));

The statements
byte var = ~34;
System.out.println(var);

It is typical to start a method name with

What does the following program output?
public class TestFirstApp {
public static void main (string[] args) {
int count = 0;
for (int var = 0 ; var < 1000; var = var _+ 1) { if (var % 3 == 1) count++; var + var+3; } System.out.print(count); } }

What is the output of the following program?
public class TestTirstApp {
public static void main (string [] args) {
int a=1, b=13;
if ( (b<(a=a+a))|| (b<(a=a+a)) || (b<(a=a+a)) || (b<(a=a+a)) || (b<(a=a+a)) System.out.println(b-a); else System.out.println(b+a); } }

What is the output of the following program?
public class TestTirstApp {
public static void main (string [] args) {
lebell : for (int i=0l i<5; ++i)
label2 : for (int j=0; j<3; ++j) {
if (j<=i) { System.out.print (j) ; continue labell ; } else break label2; } } }

The Java language is

What is the output of this program?

What will be the output of this program if Statement A, is replaced by the statement

Which of the following comments about this program is/are correct?
(Assume there is no exception raised and remember that indexing starts at 0.)

Which of the following is/are assumption(s) made by this program?

What will be the output of this program if Statement A, is replaced by the statement
System.out.println (doThis(0, 8, 200)) ;

What will be the output of the program if Statement A. is replaced by the statement
System.out.println(doThis(2, 6, 2)) ;

The number of bytes needed to store a number of datatype double is

The following program
public class TestFirstApp {public static void main (string [] args) {
int wer = 0123;
System.out.println(wer) ;
}
}
ourputs

Which of the following can be used to copy data from one array to another?

Which of the following operators don’t always evaluate all their operands?

Let Root be a class. Let Branch be a subclass of Root. Let this Branch be a Branch object. The condition – this Branch instanceof Root,

What do the following statements print?
int m = 1;
for (; m < 20 ; m ++) System.out.print(m*=1+m) ;

What is the output if the value of m is 3?

What is the output if the value of m is 33?

Which of the following parameter passing mode(s) is/are supported by Java?

To find the maximum of two given integers a and b, Student A used the expression, a>b ? a : b. Student B used the call Meth.max(a,b). One of these two students got special recognition from the professor. Who is it?

The expression, Math.max(m,n), is same as the expression

Which of the following option correctly implement(s) the above flowchart?

Which of the following activities has the potential to throw a checked Exception?

A method is not working as expected.As part of the debugging process. I wan to check if a specific condition is met at a particular point, irrespective of how the execution reached that point. What language feature should I use?

To promote encapsulation, java provides an access modifier of type

Which of the following is/are NOT output by the following program?
public class TestFirstApp {
public boolean i;
public TestFirstApp () {
if (i == true) System.out.print(“Sunday”) ;
else System.out.print (“Monday”) ;
i – false;
}
{
if (i == true) System.out.print (“Tuesday”);
else System.out.print (“Wednesday”);
i = true;
}
public static void main (string [] args) {
TestFirstApp myObj = new TestFirstApp ();
if (myObj.i == true) System.out.print (“Thursday”);
else System.out.print (“Friday”);
}
}

What is the output of this program if the body of the for loop is this statement
d = d+1;

What is the output of this program if the body of the for loop is the if/else statement?
if ((a%3) == 0)
d = d-1;
else
d = d+1;

What is the output of this program if the body of the for loop is the if satement
if ( ((a%2) ==0) && ((b%3) == 0) || ((c%4) == 0) )
d = d+1;

What is the output of this program if the body of the for loop is the if satement
if ( ((a+b+c)%3) == 0 )
d = d+1;

What is the output of this program if the body of the for loop is the if satement
if ( ((a%2) !=0) || ((b%3) != 0) || ((c%4) != 0) )
d = d+1;

How much of storage does a character (represented in Unicode) need?

Which of the following calls find the minimum of three given integers, a, b, and c?

Consider the following program
public class TestFirstApp {
public boolean abc;
public static void main (string [] args) {
TestFirstApp myObj = new TestFirstApp() ;
System.out.println(myObj.abc);
}
}
What does this program output?

Which of the following is/are syntactically correct?

Removal of which of these statement(s) will result in a compilation error?

The name of the file that contains this program

If this program is invoked from the command line as
java TestFirstApp Is Successful
Statement E will output

Which of these classes does NOT have a superclass?

What is the output of the following program?
public class TestFirst App {
public static void main (string [] args) {
int a=12, b=7, c=3;
System.out.println(a%b%c);
}
}

What statement(s) could go into the black box if this program prints 11?

Assume that the black box has the statement. i=11; What is the output if the statement
TestFirstApp myObj = new TestFirstApp () ;
is replaced by the statement
TestFirstApp myObj = new TestFirstApp (2, 3) ;

Which of the following access specifiers is usually used with inheritance?

The statements
byte var1 = -10, var2 = -22;
System.out.println (var1 & var2) ;

What does the following program output?
public class TestFirstApp {public static void main (string[] args) {
int count = 0
for (int var = 0; var < 100; var = var + 1) { if (var % 3 == 1) var = var+3; count ++; } System.out.print(count) ; } }

What is the output of this program?

What is the output if the call wer.doThis (13) in Statement j, is replaced by the call wer.doThis(7)?

This program is a student’s response to to the question:
“For a given array of integers and a given integer m, write a Java Program that counts and displays the largest number of m’s that appear together”
However, the student’s response doesn’t give the correct output for certain value (s) of m.
For which of the following values of m does the program give an incorrect output? (The student used the variable inp to refer to m,)

Which one of the following statement needs to be changed so that the program gives the correct output for any valid input?

What is the output if the call wer. doThis (13) in Statement J, is replaced by the call wer, doThis(2, 9) ?

Which of the following statements are not necessary?

Which of the following statements are not necessary?

Which of the following operators act on only integer operands?

Consider the following program fragment.
if (a>b)
System.out.println(“Statement 1”);
else
System.out.println (“Statement 2”);
System.out.println (“Statement 3”);
Statement 3 will be printed if

An interactive Program asks the question__”Are you right-handed, left-handed, or ambidextrous ? Type R if right-handed, L if Left-Handed, A if ambidextrous.”The part of the Program (written by student A) that does the appropriate action depending on the user’s response, is given below.
if (response == ‘A’) // condition 1
doThisForAmbidextrous( );
else if (response == ‘R’) // condition 2
doThisForRightHanded( );
else if (response == ‘L’) // condition 3
doThisForLeftHanded ( );
Student B did the same thing bu checked the condition in the order– condition 3,condition 2 and condition 1
Student C did the same thing bu checked the condition in the order– condition 2,condition 3 and condition 1
Student D did the same thing bu checked the condition in the order– condition 2,condition 1 and condition 3
One of these four students got special recognition form the professor for the order in Which the student checked the conditions. Who is that student?

Consider the following statement
System.out.print (Math.round(Math.random()) );
This statement was executed 15 times. The first 14 execution printed 0,1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1. What did the 15th execution print?

How many #’s does the following for loop output?
for(int m=0, n=100; n-m > 30; ++m, –n)
System.out.print (“#”);

The expression
(int) Math.floor (m + 0.5)
is mathematically equivalent to

Which of the following will not appear in the output?

Choose the correct statement(s).

Which of the following code correctly implement(s) the following flowchart?
print one__False__m==n__False__x>y__False__a<=b

Which of the following keywords is used to declare exceptions that can possibly occur?

This program outputs

What will be the output if the condition in Statement A, is replaced by the condition, x%2 != 0?

Which of the following types of exceptions must be declared by a piece of code that has the potential to throw such a type of exception?

What does the following fragment do to the two-dimensional matrix x?
int [] [] x = { {1, 2, 3, 4}, {4, 3, 2, 1}, {6, 7, 8, 9}, {1, 3, 5, 7} };
for(int i=0 ; i<4 ; ++i)
for (int j=0 ; j<4 ; ++j)
x [i] [j] = x [j] [i];

The finalize method is declared with the access specifier

Which of the following can be statement A?

Which of the following can be Statement B?

Which of the following number variables is/are not accessible in class Third?

Which of the following calls find the maximum of the three integer a,b,c?

Which of the following calls find the minimum of the three integers a, b, c?

Which of the following declaration of a local variable is invalid?

The following Program
public class TestFirstApp {
public static void main (string[] args) {
int wer = 0x123;
System.out.println(wer);
}
}
outputs

Which is true of constructors?

What is the output of the following program?
public class TestFirstApp {
public static void main (string [] args) {
System.out.println (( 1==2) ? )7==7) ? : 6 : 4):
}
}

Choose the correct statement(s)

The statement
System.out.println(“This is what you see: ” + 1 + 2):

The recursive function magic gets into an infinite loop if

The recursive function magic returns a negative integer if

Choose the correct statement(s).
If statement A is

Which of the following conclusions cannot be true if A extends B is syntactically correct in a program?

What does the following program fragment do to the two-dimensional matix x?
int [] [] x = { {1, 2, 3, 4}, {4, 3, 2, 1}, {6, 7, 8, 9}, {1, 3, 5, 7}, };
for (int i=0 ; i<4 ; ++i)
for (int j=0; j<4 ; ++1)
if (i==j)
x[i][j]= 1;
else
x[i][j] = 0;

Which of the following packages needs to be imported to use the StringTokenizer class?

Which of the following represents the range of values that a variable of datatype byte can take?

What is the output of the following program?
public class TestFirstApp {
public static void main (string[] args) {
int a=1, b=2;
if ( (a==3)&& (b==(b=3)) )
;
else System.out.println(b);
}
}

Which of the following are standard stream objects?

The statements
byte var1 = -51, var2 = -28;
System.out.println(var1 & var2) ;

The following program
public class TestFirstApp {
public static void main (string[] args) {
int m=1;
if (m)
System.out.println(m);
}
}

Which of the following control structures would you be using if the switch statement is not available in Java?
Assume each case ends with the break statement.

The statements
int a = (int) 3.9;
System.out intln (a) ;

The statements
int [ ] wer = {1, 5, 6}; //Statement 1
int m=1; // Statement 2
wer[m++]++; //statement 3
System.out.println(“” + wer[0] + wer[1] + wer[2]);

Which of the following repository is used by the runtime system to identify the correct exception handler when an exception is thrown?

Consider the following incomplete program.
public class TestFirstApp {
public static void main (string[] args) {
for (int j = 1; j < 6; j++) { for (int k = 1; k _____ ; k++) System.out.print(j + " "); System.out.print() ; } } } What should go into the black box if the desired output is 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5

Let a and b be two positive integers. Which of the following correctly relates a and b?

Which of the following methods neither takes any parameter nor returns anything?

What is the output of the following program?
public class TestFirstApp {
public void doIt (int m, int n) {
int k;
k=m;
m=n;
n=k;
System.out.print(m);
return;
}
public static void main(string[] args) {
int m=3, n=5;
TestFirstApp myObj = new TestFirstApp();
myObj.doIt(m,n);
System.out.print(m);
}
}